About some hardware machining
By Titi | 24 September 2021 | 2 Comments

The four characteristics of precision molds

High-speed development of precision moulds, China's precision mould industry has been located in the forefront of the world. At present, China's precision mold has wear resistance, . Strong toughness, fatigue fracture performance, high temperature performance these four characteristics, the following is to share the four characteristics of precision mold.

The four characteristics of precision mold 
1、Abrasion resistance 
When the blank is plasticized in the mold cavity, it flows and slides along the surface of the cavity, causing violent friction between the surface of the cavity and the blank, which leads to the failure of the mold due to wear. Therefore, the wear resistance of the material is one of the most basic and important properties of the mold.
Hardness is the main factor affecting wear resistance. Generally speaking, the higher the hardness of the mold part, the smaller the wear, and the better the wear resistance. In addition, the wear resistance is also related to the type, quantity, form, size and distribution of carbide in the material. 

2、Strong toughness 
Most of the working conditions of the mold is very bad, some often bear a large impact load, which leads to brittle fracture. To prevent the mold parts in the work of sudden brittle fracture, precision hardware mold to have high strength and toughness. 
The toughness of the mold mainly depends on the carbon content of the material, grain size and tissue state - precision mold manufacturing. 

3、Fatigue fracture performance
During the work of the mold, under the long-term effect of cyclic stress, often lead to fatigue fracture. The form of small energy multiple impact fatigue fracture, tensile fatigue fracture contact fatigue fracture and bending fatigue fracture.
The fatigue fracture performance of the mold mainly depends on its strength, toughness, hardness, and the content of inclusions in the material. 

4、High temperature performance
When the working temperature of the mold is higher into, it will make the hardness and strength decrease, leading to early wear or plastic deformation of the mold and failure. Therefore, precision hardware mold material should have high tempering stability to ensure that the mold in the working temperature, with high hardness and strength.

Recently Reviews

Read More

Leave a Reply

Your email address will not be published.Required fields are marked. *
Verification code